/home/user # apt-get install -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 14 not upgraded.
2 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Setting up libpaper1 (1.1.21) ...
/var/lib/dpkg/info/libpaper1.postinst: line 45: ucf: not found
dpkg: error processing libpaper1 (--configure):
 subprocess post-installation script returned error exit status 127
dpkg: dependency problems prevent configuration of tuxpaint:
 tuxpaint depends on libpaper1 (>= 1.1.21); however:
  Package libpaper1 is not configured yet.
dpkg: error processing tuxpaint (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libpaper1
 tuxpaint
E: Sub-process /usr/bin/dpkg returned an error code (1)
/home/user #